GMT Zoneinfo Timezones

The /usr/share/lib/zoneinfo/GMT[+-]* time zones might no longer be supported
in a future release. These files might be removed from /usr/share/lib/zoneinfo.
Replace usage of the zoneinfo timezones with the equivalent Etc/GMT[-+]* file.
See zoneinfo(4)
and environ(5)
for more information.